Welcome to OCN!
Here's a recent thread that may interest you that even has the same tittle as this one (made me look twice)
it is getting lengthy but does contain a lot of good info for the FX6300.
Here's a real good place to learn the basics from http://www.overclock.net/t/1348623/amd-bulldozer-and-piledriver-overclocking-guide-asus-motherboard
Even though it's for an Asus mobo the basics remain the same.
Please realize that OCing on a Micro ATX is not the norm (bad idea IMHO).
As mentioned above yours only has a 4+1 power phase (voltage regulation) and may not be up to the task.
You'll definitely want to add active cooling for the VRMs (HS left of CPU) on a mini ATX. There are pics of mine in my rig sig.
Looking at the Bios pic (what I can see of it), for starting out I would enter as many stock/default values as you can come up with (you may have to learn/research a couple) manually enter the following,
The fewer items on "auto" the better.
CPU NB Freq to 2000MHz. Note Bios shows default value for this one.
Core Performance Boost - to disabled. This is Giga's "Turbo" which should be disabled for OCing.
PCIE Clock to 100MHz
Ht Link Width - can't help with this one
Ht Link Freq - 2000MHz
Set Memory Clock - For this and the next item down in pic (Dram Config) you want to manually enter all the info (Freq, Voltage, Timings here) that is printed on the sticker, on the Dram itself.
System Voltage Control - I'm not sure what this is (Giga Bios)
But I'd guess maybe it's "Offset Voltage" perhaps? You'll have to post back if you have questions.
NB Volt Control - leave on "auto"
DDR3 Voltage - this where you manually enter Dram Voltage from sticker.
CPU Volt Control - can't say for sure. Not enough info
CPU NB VID Control - same as above. I'd leave these two on auto till you learn more about them.
I'm guessing you already know about the CPU multiplier and how to use it (it's covered in the guide above if not)
At this point try stressing system a little and watch your temps very closely. My guess is it'll heat up rather quickly so be very careful.
Normally I'd recommend running IBT AVX version found here http://www.overclock.net/attachments/13202
set to Very High for starters but in this case play it safe and only try a Standard setting (default).
Post a snip of test results showing HWinfo64 (free DL) like this and we'll see how things look at stock.
Warning: Spoiler! (Click to show)
To view full screen click snip than in lower right hand corner click "Original".
Again BE VERY CAREFUL and do this only at your own risk.
I have to say it again, OCing on a mini ATX is never a good idea period.